PSI - Issue 57

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 57 (2024) 22–31

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers Thermo-elastic Stress Analysis (TSA) is a non-contact technique for measuring the distribution of stress at the surface of a component subject to cyclic loading using an infrared camera. The analysis of the thermo-elastic coupling amplitude maps allows the detection of initiation and monitoring of crack propagation. A four-point bending fatigue test protocol is conducted on CuAl9 WAAM specimens take in different direction for the deposition direction. Then failure mode and life duration are compared for the 2 directions. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers Keywords: Additive Manufacturing, TSA, anisotropy, as built surface Abstract Wire Arc Additive Manufacturing is an additive manufacturing process with a high rate of material deposition capable of producing near-net shape parts. This process involves the reduction of production costs (material and lead times) and considers innovative designs. However, the deposition technique induces heterogeneities in the material, in particular the presence of porosity and a degraded surface finish. The process-induced surface asperities have a first order influence on the fatigue life of as-built parts as they act as stress raisers. Various finishing treatments can be considered to reduce the criticality of the surface finish influence over crack initiation and propagation: conventional ones such as hammer, laser or shot peening and some specially developed for Additive Manufacturing (AM) processes such as in-situ cooling or hot rolling. The multitude of AM parameters and the different finishing surface post treatments entail many configurations that will modify fatigue properties. For this reason, rapid fatigue evaluation methods are an asset for process evaluation. Thermo-elastic Stress Analysis (TSA) is a non-contact technique for measuring the distribution of stress at the surface of a component subject to cyclic loading using an infrared camera. The analysis of the thermo-elastic coupling amplitude maps allows the detection of initiation and monitoring of crack propagation. A four-point bending fatigue test protocol is conducted on CuAl9 WAAM specimens take in different direction for the deposition direction. Then failure mode and life duration are compared for the 2 directions. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers Keywords: Additive Manufacturing, TSA, anisotropy, as built surface Fatigue Design 2023 (FatDes 2023) Infrared imaging surface roughness criticality assessment of Wire Arc Additive Manufactured specimens Mathilde Renault 1,2 , Lorenzo Bercelli 2 , Cédric Doudard 2 , Bruno Levieil 2 , Julien Beaudet 1 , Sylvain Calloch 2 Fatigue Design 2023 (FatDes 2023) Infrared imaging surface roughness criticality assessment of Wire Arc Additive Manufactured specimens Mathilde Renault 1,2 , Lorenzo Bercelli 2 , Cédric Doudard 2 , Bruno Levieil 2 , Julien Beaudet 1 , Sylvain Calloch 2 1. Naval Group Research, Technocampus Océan, 5 rue de l’Halbrane, 44340 Bouguenais, France 2.ENSTA Bretagne, UMR CNRS 6027, IRDL, 29200 Brest, France 1. Naval Group Research, Technocampus Océan, 5 rue de l’Halbrane, 44340 Bouguenais, France 2.ENSTA Bretagne, UMR CNRS 6027, IRDL, 29200 Brest, France Abstract Wire Arc Additive Manufacturing is an additive manufacturing process with a high rate of material deposition capable of producing near-net shape parts. This process involves the reduction of production costs (material and lead times) and considers innovative designs. However, the deposition technique induces heterogeneities in the material, in particular the presence of porosity and a degraded surface finish. The process-induced surface asperities have a first order influence on the fatigue life of as-built parts as they act as stress raisers. Various finishing treatments can be considered to reduce the criticality of the surface finish influence over crack initiation and propagation: conventional ones such as hammer, laser or shot peening and some specially developed for Additive Manufacturing (AM) processes such as in-situ cooling or hot rolling. The multitude of AM parameters and the different finishing surface post treatments entail many configurations that will modify fatigue properties. For this reason, rapid fatigue evaluation methods are an asset for process evaluation.

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers 2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers 10.1016/j.prostr.2024.03.004